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Re: spam blocking engine

> > Getting a good list of open relays is hard.  The last time I looked
> > (which was, admittedly, a while ago) I did not find very good
> > correspondence between the sites from which I saw spam being
> > originated, and which sites were blocked in several popular lists.
> relays.visi.com was good, but it's been shut down.

Somebody at the San Diego Supercomputing Center publishes a survey 
survey and comparison of publicly-accessible DNS blacklists of spam 


David S.

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